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Merge remote-tracking branch 'remotes/kraxel/tags/usb-20181029-pull-request' into...
[mirror_qemu.git] / hw / ppc / spapr_pci.c
1 /*
2 * QEMU sPAPR PCI host originated from Uninorth PCI host
3 *
4 * Copyright (c) 2011 Alexey Kardashevskiy, IBM Corporation.
5 * Copyright (C) 2011 David Gibson, IBM Corporation.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25 #include "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "qemu-common.h"
28 #include "cpu.h"
29 #include "hw/hw.h"
30 #include "hw/sysbus.h"
31 #include "hw/pci/pci.h"
32 #include "hw/pci/msi.h"
33 #include "hw/pci/msix.h"
34 #include "hw/pci/pci_host.h"
35 #include "hw/ppc/spapr.h"
36 #include "hw/pci-host/spapr.h"
37 #include "exec/address-spaces.h"
38 #include "exec/ram_addr.h"
39 #include <libfdt.h>
40 #include "trace.h"
41 #include "qemu/error-report.h"
42 #include "qapi/qmp/qerror.h"
43 #include "hw/ppc/fdt.h"
44 #include "hw/pci/pci_bridge.h"
45 #include "hw/pci/pci_bus.h"
46 #include "hw/pci/pci_ids.h"
47 #include "hw/ppc/spapr_drc.h"
48 #include "sysemu/device_tree.h"
49 #include "sysemu/kvm.h"
50 #include "sysemu/hostmem.h"
51 #include "sysemu/numa.h"
52
53 /* Copied from the kernel arch/powerpc/platforms/pseries/msi.c */
54 #define RTAS_QUERY_FN 0
55 #define RTAS_CHANGE_FN 1
56 #define RTAS_RESET_FN 2
57 #define RTAS_CHANGE_MSI_FN 3
58 #define RTAS_CHANGE_MSIX_FN 4
59
60 /* Interrupt types to return on RTAS_CHANGE_* */
61 #define RTAS_TYPE_MSI 1
62 #define RTAS_TYPE_MSIX 2
63
64 sPAPRPHBState *spapr_pci_find_phb(sPAPRMachineState *spapr, uint64_t buid)
65 {
66 sPAPRPHBState *sphb;
67
68 QLIST_FOREACH(sphb, &spapr->phbs, list) {
69 if (sphb->buid != buid) {
70 continue;
71 }
72 return sphb;
73 }
74
75 return NULL;
76 }
77
78 PCIDevice *spapr_pci_find_dev(sPAPRMachineState *spapr, uint64_t buid,
79 uint32_t config_addr)
80 {
81 sPAPRPHBState *sphb = spapr_pci_find_phb(spapr, buid);
82 PCIHostState *phb = PCI_HOST_BRIDGE(sphb);
83 int bus_num = (config_addr >> 16) & 0xFF;
84 int devfn = (config_addr >> 8) & 0xFF;
85
86 if (!phb) {
87 return NULL;
88 }
89
90 return pci_find_device(phb->bus, bus_num, devfn);
91 }
92
93 static uint32_t rtas_pci_cfgaddr(uint32_t arg)
94 {
95 /* This handles the encoding of extended config space addresses */
96 return ((arg >> 20) & 0xf00) | (arg & 0xff);
97 }
98
99 static void finish_read_pci_config(sPAPRMachineState *spapr, uint64_t buid,
100 uint32_t addr, uint32_t size,
101 target_ulong rets)
102 {
103 PCIDevice *pci_dev;
104 uint32_t val;
105
106 if ((size != 1) && (size != 2) && (size != 4)) {
107 /* access must be 1, 2 or 4 bytes */
108 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
109 return;
110 }
111
112 pci_dev = spapr_pci_find_dev(spapr, buid, addr);
113 addr = rtas_pci_cfgaddr(addr);
114
115 if (!pci_dev || (addr % size) || (addr >= pci_config_size(pci_dev))) {
116 /* Access must be to a valid device, within bounds and
117 * naturally aligned */
118 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
119 return;
120 }
121
122 val = pci_host_config_read_common(pci_dev, addr,
123 pci_config_size(pci_dev), size);
124
125 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
126 rtas_st(rets, 1, val);
127 }
128
129 static void rtas_ibm_read_pci_config(PowerPCCPU *cpu, sPAPRMachineState *spapr,
130 uint32_t token, uint32_t nargs,
131 target_ulong args,
132 uint32_t nret, target_ulong rets)
133 {
134 uint64_t buid;
135 uint32_t size, addr;
136
137 if ((nargs != 4) || (nret != 2)) {
138 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
139 return;
140 }
141
142 buid = rtas_ldq(args, 1);
143 size = rtas_ld(args, 3);
144 addr = rtas_ld(args, 0);
145
146 finish_read_pci_config(spapr, buid, addr, size, rets);
147 }
148
149 static void rtas_read_pci_config(PowerPCCPU *cpu, sPAPRMachineState *spapr,
150 uint32_t token, uint32_t nargs,
151 target_ulong args,
152 uint32_t nret, target_ulong rets)
153 {
154 uint32_t size, addr;
155
156 if ((nargs != 2) || (nret != 2)) {
157 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
158 return;
159 }
160
161 size = rtas_ld(args, 1);
162 addr = rtas_ld(args, 0);
163
164 finish_read_pci_config(spapr, 0, addr, size, rets);
165 }
166
167 static void finish_write_pci_config(sPAPRMachineState *spapr, uint64_t buid,
168 uint32_t addr, uint32_t size,
169 uint32_t val, target_ulong rets)
170 {
171 PCIDevice *pci_dev;
172
173 if ((size != 1) && (size != 2) && (size != 4)) {
174 /* access must be 1, 2 or 4 bytes */
175 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
176 return;
177 }
178
179 pci_dev = spapr_pci_find_dev(spapr, buid, addr);
180 addr = rtas_pci_cfgaddr(addr);
181
182 if (!pci_dev || (addr % size) || (addr >= pci_config_size(pci_dev))) {
183 /* Access must be to a valid device, within bounds and
184 * naturally aligned */
185 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
186 return;
187 }
188
189 pci_host_config_write_common(pci_dev, addr, pci_config_size(pci_dev),
190 val, size);
191
192 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
193 }
194
195 static void rtas_ibm_write_pci_config(PowerPCCPU *cpu, sPAPRMachineState *spapr,
196 uint32_t token, uint32_t nargs,
197 target_ulong args,
198 uint32_t nret, target_ulong rets)
199 {
200 uint64_t buid;
201 uint32_t val, size, addr;
202
203 if ((nargs != 5) || (nret != 1)) {
204 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
205 return;
206 }
207
208 buid = rtas_ldq(args, 1);
209 val = rtas_ld(args, 4);
210 size = rtas_ld(args, 3);
211 addr = rtas_ld(args, 0);
212
213 finish_write_pci_config(spapr, buid, addr, size, val, rets);
214 }
215
216 static void rtas_write_pci_config(PowerPCCPU *cpu, sPAPRMachineState *spapr,
217 uint32_t token, uint32_t nargs,
218 target_ulong args,
219 uint32_t nret, target_ulong rets)
220 {
221 uint32_t val, size, addr;
222
223 if ((nargs != 3) || (nret != 1)) {
224 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
225 return;
226 }
227
228
229 val = rtas_ld(args, 2);
230 size = rtas_ld(args, 1);
231 addr = rtas_ld(args, 0);
232
233 finish_write_pci_config(spapr, 0, addr, size, val, rets);
234 }
235
236 /*
237 * Set MSI/MSIX message data.
238 * This is required for msi_notify()/msix_notify() which
239 * will write at the addresses via spapr_msi_write().
240 *
241 * If hwaddr == 0, all entries will have .data == first_irq i.e.
242 * table will be reset.
243 */
244 static void spapr_msi_setmsg(PCIDevice *pdev, hwaddr addr, bool msix,
245 unsigned first_irq, unsigned req_num)
246 {
247 unsigned i;
248 MSIMessage msg = { .address = addr, .data = first_irq };
249
250 if (!msix) {
251 msi_set_message(pdev, msg);
252 trace_spapr_pci_msi_setup(pdev->name, 0, msg.address);
253 return;
254 }
255
256 for (i = 0; i < req_num; ++i) {
257 msix_set_message(pdev, i, msg);
258 trace_spapr_pci_msi_setup(pdev->name, i, msg.address);
259 if (addr) {
260 ++msg.data;
261 }
262 }
263 }
264
265 static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
266 uint32_t token, uint32_t nargs,
267 target_ulong args, uint32_t nret,
268 target_ulong rets)
269 {
270 sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
271 uint32_t config_addr = rtas_ld(args, 0);
272 uint64_t buid = rtas_ldq(args, 1);
273 unsigned int func = rtas_ld(args, 3);
274 unsigned int req_num = rtas_ld(args, 4); /* 0 == remove all */
275 unsigned int seq_num = rtas_ld(args, 5);
276 unsigned int ret_intr_type;
277 unsigned int irq, max_irqs = 0;
278 sPAPRPHBState *phb = NULL;
279 PCIDevice *pdev = NULL;
280 spapr_pci_msi *msi;
281 int *config_addr_key;
282 Error *err = NULL;
283 int i;
284
285 /* Fins sPAPRPHBState */
286 phb = spapr_pci_find_phb(spapr, buid);
287 if (phb) {
288 pdev = spapr_pci_find_dev(spapr, buid, config_addr);
289 }
290 if (!phb || !pdev) {
291 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
292 return;
293 }
294
295 switch (func) {
296 case RTAS_CHANGE_FN:
297 if (msi_present(pdev)) {
298 ret_intr_type = RTAS_TYPE_MSI;
299 } else if (msix_present(pdev)) {
300 ret_intr_type = RTAS_TYPE_MSIX;
301 } else {
302 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
303 return;
304 }
305 break;
306 case RTAS_CHANGE_MSI_FN:
307 if (msi_present(pdev)) {
308 ret_intr_type = RTAS_TYPE_MSI;
309 } else {
310 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
311 return;
312 }
313 break;
314 case RTAS_CHANGE_MSIX_FN:
315 if (msix_present(pdev)) {
316 ret_intr_type = RTAS_TYPE_MSIX;
317 } else {
318 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
319 return;
320 }
321 break;
322 default:
323 error_report("rtas_ibm_change_msi(%u) is not implemented", func);
324 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
325 return;
326 }
327
328 msi = (spapr_pci_msi *) g_hash_table_lookup(phb->msi, &config_addr);
329
330 /* Releasing MSIs */
331 if (!req_num) {
332 if (!msi) {
333 trace_spapr_pci_msi("Releasing wrong config", config_addr);
334 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
335 return;
336 }
337
338 if (!smc->legacy_irq_allocation) {
339 spapr_irq_msi_free(spapr, msi->first_irq, msi->num);
340 }
341 spapr_irq_free(spapr, msi->first_irq, msi->num);
342 if (msi_present(pdev)) {
343 spapr_msi_setmsg(pdev, 0, false, 0, 0);
344 }
345 if (msix_present(pdev)) {
346 spapr_msi_setmsg(pdev, 0, true, 0, 0);
347 }
348 g_hash_table_remove(phb->msi, &config_addr);
349
350 trace_spapr_pci_msi("Released MSIs", config_addr);
351 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
352 rtas_st(rets, 1, 0);
353 return;
354 }
355
356 /* Enabling MSI */
357
358 /* Check if the device supports as many IRQs as requested */
359 if (ret_intr_type == RTAS_TYPE_MSI) {
360 max_irqs = msi_nr_vectors_allocated(pdev);
361 } else if (ret_intr_type == RTAS_TYPE_MSIX) {
362 max_irqs = pdev->msix_entries_nr;
363 }
364 if (!max_irqs) {
365 error_report("Requested interrupt type %d is not enabled for device %x",
366 ret_intr_type, config_addr);
367 rtas_st(rets, 0, -1); /* Hardware error */
368 return;
369 }
370 /* Correct the number if the guest asked for too many */
371 if (req_num > max_irqs) {
372 trace_spapr_pci_msi_retry(config_addr, req_num, max_irqs);
373 req_num = max_irqs;
374 irq = 0; /* to avoid misleading trace */
375 goto out;
376 }
377
378 /* Allocate MSIs */
379 if (smc->legacy_irq_allocation) {
380 irq = spapr_irq_find(spapr, req_num, ret_intr_type == RTAS_TYPE_MSI,
381 &err);
382 } else {
383 irq = spapr_irq_msi_alloc(spapr, req_num,
384 ret_intr_type == RTAS_TYPE_MSI, &err);
385 }
386 if (err) {
387 error_reportf_err(err, "Can't allocate MSIs for device %x: ",
388 config_addr);
389 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
390 return;
391 }
392
393 for (i = 0; i < req_num; i++) {
394 spapr_irq_claim(spapr, irq + i, false, &err);
395 if (err) {
396 error_reportf_err(err, "Can't allocate MSIs for device %x: ",
397 config_addr);
398 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
399 return;
400 }
401 }
402
403 /* Release previous MSIs */
404 if (msi) {
405 if (!smc->legacy_irq_allocation) {
406 spapr_irq_msi_free(spapr, msi->first_irq, msi->num);
407 }
408 spapr_irq_free(spapr, msi->first_irq, msi->num);
409 g_hash_table_remove(phb->msi, &config_addr);
410 }
411
412 /* Setup MSI/MSIX vectors in the device (via cfgspace or MSIX BAR) */
413 spapr_msi_setmsg(pdev, SPAPR_PCI_MSI_WINDOW, ret_intr_type == RTAS_TYPE_MSIX,
414 irq, req_num);
415
416 /* Add MSI device to cache */
417 msi = g_new(spapr_pci_msi, 1);
418 msi->first_irq = irq;
419 msi->num = req_num;
420 config_addr_key = g_new(int, 1);
421 *config_addr_key = config_addr;
422 g_hash_table_insert(phb->msi, config_addr_key, msi);
423
424 out:
425 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
426 rtas_st(rets, 1, req_num);
427 rtas_st(rets, 2, ++seq_num);
428 if (nret > 3) {
429 rtas_st(rets, 3, ret_intr_type);
430 }
431
432 trace_spapr_pci_rtas_ibm_change_msi(config_addr, func, req_num, irq);
433 }
434
435 static void rtas_ibm_query_interrupt_source_number(PowerPCCPU *cpu,
436 sPAPRMachineState *spapr,
437 uint32_t token,
438 uint32_t nargs,
439 target_ulong args,
440 uint32_t nret,
441 target_ulong rets)
442 {
443 uint32_t config_addr = rtas_ld(args, 0);
444 uint64_t buid = rtas_ldq(args, 1);
445 unsigned int intr_src_num = -1, ioa_intr_num = rtas_ld(args, 3);
446 sPAPRPHBState *phb = NULL;
447 PCIDevice *pdev = NULL;
448 spapr_pci_msi *msi;
449
450 /* Find sPAPRPHBState */
451 phb = spapr_pci_find_phb(spapr, buid);
452 if (phb) {
453 pdev = spapr_pci_find_dev(spapr, buid, config_addr);
454 }
455 if (!phb || !pdev) {
456 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
457 return;
458 }
459
460 /* Find device descriptor and start IRQ */
461 msi = (spapr_pci_msi *) g_hash_table_lookup(phb->msi, &config_addr);
462 if (!msi || !msi->first_irq || !msi->num || (ioa_intr_num >= msi->num)) {
463 trace_spapr_pci_msi("Failed to return vector", config_addr);
464 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
465 return;
466 }
467 intr_src_num = msi->first_irq + ioa_intr_num;
468 trace_spapr_pci_rtas_ibm_query_interrupt_source_number(ioa_intr_num,
469 intr_src_num);
470
471 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
472 rtas_st(rets, 1, intr_src_num);
473 rtas_st(rets, 2, 1);/* 0 == level; 1 == edge */
474 }
475
476 static void rtas_ibm_set_eeh_option(PowerPCCPU *cpu,
477 sPAPRMachineState *spapr,
478 uint32_t token, uint32_t nargs,
479 target_ulong args, uint32_t nret,
480 target_ulong rets)
481 {
482 sPAPRPHBState *sphb;
483 uint32_t addr, option;
484 uint64_t buid;
485 int ret;
486
487 if ((nargs != 4) || (nret != 1)) {
488 goto param_error_exit;
489 }
490
491 buid = rtas_ldq(args, 1);
492 addr = rtas_ld(args, 0);
493 option = rtas_ld(args, 3);
494
495 sphb = spapr_pci_find_phb(spapr, buid);
496 if (!sphb) {
497 goto param_error_exit;
498 }
499
500 if (!spapr_phb_eeh_available(sphb)) {
501 goto param_error_exit;
502 }
503
504 ret = spapr_phb_vfio_eeh_set_option(sphb, addr, option);
505 rtas_st(rets, 0, ret);
506 return;
507
508 param_error_exit:
509 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
510 }
511
512 static void rtas_ibm_get_config_addr_info2(PowerPCCPU *cpu,
513 sPAPRMachineState *spapr,
514 uint32_t token, uint32_t nargs,
515 target_ulong args, uint32_t nret,
516 target_ulong rets)
517 {
518 sPAPRPHBState *sphb;
519 PCIDevice *pdev;
520 uint32_t addr, option;
521 uint64_t buid;
522
523 if ((nargs != 4) || (nret != 2)) {
524 goto param_error_exit;
525 }
526
527 buid = rtas_ldq(args, 1);
528 sphb = spapr_pci_find_phb(spapr, buid);
529 if (!sphb) {
530 goto param_error_exit;
531 }
532
533 if (!spapr_phb_eeh_available(sphb)) {
534 goto param_error_exit;
535 }
536
537 /*
538 * We always have PE address of form "00BB0001". "BB"
539 * represents the bus number of PE's primary bus.
540 */
541 option = rtas_ld(args, 3);
542 switch (option) {
543 case RTAS_GET_PE_ADDR:
544 addr = rtas_ld(args, 0);
545 pdev = spapr_pci_find_dev(spapr, buid, addr);
546 if (!pdev) {
547 goto param_error_exit;
548 }
549
550 rtas_st(rets, 1, (pci_bus_num(pci_get_bus(pdev)) << 16) + 1);
551 break;
552 case RTAS_GET_PE_MODE:
553 rtas_st(rets, 1, RTAS_PE_MODE_SHARED);
554 break;
555 default:
556 goto param_error_exit;
557 }
558
559 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
560 return;
561
562 param_error_exit:
563 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
564 }
565
566 static void rtas_ibm_read_slot_reset_state2(PowerPCCPU *cpu,
567 sPAPRMachineState *spapr,
568 uint32_t token, uint32_t nargs,
569 target_ulong args, uint32_t nret,
570 target_ulong rets)
571 {
572 sPAPRPHBState *sphb;
573 uint64_t buid;
574 int state, ret;
575
576 if ((nargs != 3) || (nret != 4 && nret != 5)) {
577 goto param_error_exit;
578 }
579
580 buid = rtas_ldq(args, 1);
581 sphb = spapr_pci_find_phb(spapr, buid);
582 if (!sphb) {
583 goto param_error_exit;
584 }
585
586 if (!spapr_phb_eeh_available(sphb)) {
587 goto param_error_exit;
588 }
589
590 ret = spapr_phb_vfio_eeh_get_state(sphb, &state);
591 rtas_st(rets, 0, ret);
592 if (ret != RTAS_OUT_SUCCESS) {
593 return;
594 }
595
596 rtas_st(rets, 1, state);
597 rtas_st(rets, 2, RTAS_EEH_SUPPORT);
598 rtas_st(rets, 3, RTAS_EEH_PE_UNAVAIL_INFO);
599 if (nret >= 5) {
600 rtas_st(rets, 4, RTAS_EEH_PE_RECOVER_INFO);
601 }
602 return;
603
604 param_error_exit:
605 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
606 }
607
608 static void rtas_ibm_set_slot_reset(PowerPCCPU *cpu,
609 sPAPRMachineState *spapr,
610 uint32_t token, uint32_t nargs,
611 target_ulong args, uint32_t nret,
612 target_ulong rets)
613 {
614 sPAPRPHBState *sphb;
615 uint32_t option;
616 uint64_t buid;
617 int ret;
618
619 if ((nargs != 4) || (nret != 1)) {
620 goto param_error_exit;
621 }
622
623 buid = rtas_ldq(args, 1);
624 option = rtas_ld(args, 3);
625 sphb = spapr_pci_find_phb(spapr, buid);
626 if (!sphb) {
627 goto param_error_exit;
628 }
629
630 if (!spapr_phb_eeh_available(sphb)) {
631 goto param_error_exit;
632 }
633
634 ret = spapr_phb_vfio_eeh_reset(sphb, option);
635 rtas_st(rets, 0, ret);
636 return;
637
638 param_error_exit:
639 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
640 }
641
642 static void rtas_ibm_configure_pe(PowerPCCPU *cpu,
643 sPAPRMachineState *spapr,
644 uint32_t token, uint32_t nargs,
645 target_ulong args, uint32_t nret,
646 target_ulong rets)
647 {
648 sPAPRPHBState *sphb;
649 uint64_t buid;
650 int ret;
651
652 if ((nargs != 3) || (nret != 1)) {
653 goto param_error_exit;
654 }
655
656 buid = rtas_ldq(args, 1);
657 sphb = spapr_pci_find_phb(spapr, buid);
658 if (!sphb) {
659 goto param_error_exit;
660 }
661
662 if (!spapr_phb_eeh_available(sphb)) {
663 goto param_error_exit;
664 }
665
666 ret = spapr_phb_vfio_eeh_configure(sphb);
667 rtas_st(rets, 0, ret);
668 return;
669
670 param_error_exit:
671 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
672 }
673
674 /* To support it later */
675 static void rtas_ibm_slot_error_detail(PowerPCCPU *cpu,
676 sPAPRMachineState *spapr,
677 uint32_t token, uint32_t nargs,
678 target_ulong args, uint32_t nret,
679 target_ulong rets)
680 {
681 sPAPRPHBState *sphb;
682 int option;
683 uint64_t buid;
684
685 if ((nargs != 8) || (nret != 1)) {
686 goto param_error_exit;
687 }
688
689 buid = rtas_ldq(args, 1);
690 sphb = spapr_pci_find_phb(spapr, buid);
691 if (!sphb) {
692 goto param_error_exit;
693 }
694
695 if (!spapr_phb_eeh_available(sphb)) {
696 goto param_error_exit;
697 }
698
699 option = rtas_ld(args, 7);
700 switch (option) {
701 case RTAS_SLOT_TEMP_ERR_LOG:
702 case RTAS_SLOT_PERM_ERR_LOG:
703 break;
704 default:
705 goto param_error_exit;
706 }
707
708 /* We don't have error log yet */
709 rtas_st(rets, 0, RTAS_OUT_NO_ERRORS_FOUND);
710 return;
711
712 param_error_exit:
713 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
714 }
715
716 static int pci_spapr_swizzle(int slot, int pin)
717 {
718 return (slot + pin) % PCI_NUM_PINS;
719 }
720
721 static int pci_spapr_map_irq(PCIDevice *pci_dev, int irq_num)
722 {
723 /*
724 * Here we need to convert pci_dev + irq_num to some unique value
725 * which is less than number of IRQs on the specific bus (4). We
726 * use standard PCI swizzling, that is (slot number + pin number)
727 * % 4.
728 */
729 return pci_spapr_swizzle(PCI_SLOT(pci_dev->devfn), irq_num);
730 }
731
732 static void pci_spapr_set_irq(void *opaque, int irq_num, int level)
733 {
734 /*
735 * Here we use the number returned by pci_spapr_map_irq to find a
736 * corresponding qemu_irq.
737 */
738 sPAPRPHBState *phb = opaque;
739
740 trace_spapr_pci_lsi_set(phb->dtbusname, irq_num, phb->lsi_table[irq_num].irq);
741 qemu_set_irq(spapr_phb_lsi_qirq(phb, irq_num), level);
742 }
743
744 static PCIINTxRoute spapr_route_intx_pin_to_irq(void *opaque, int pin)
745 {
746 sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(opaque);
747 PCIINTxRoute route;
748
749 route.mode = PCI_INTX_ENABLED;
750 route.irq = sphb->lsi_table[pin].irq;
751
752 return route;
753 }
754
755 /*
756 * MSI/MSIX memory region implementation.
757 * The handler handles both MSI and MSIX.
758 * The vector number is encoded in least bits in data.
759 */
760 static void spapr_msi_write(void *opaque, hwaddr addr,
761 uint64_t data, unsigned size)
762 {
763 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
764 uint32_t irq = data;
765
766 trace_spapr_pci_msi_write(addr, data, irq);
767
768 qemu_irq_pulse(spapr_qirq(spapr, irq));
769 }
770
771 static const MemoryRegionOps spapr_msi_ops = {
772 /* There is no .read as the read result is undefined by PCI spec */
773 .read = NULL,
774 .write = spapr_msi_write,
775 .endianness = DEVICE_LITTLE_ENDIAN
776 };
777
778 /*
779 * PHB PCI device
780 */
781 static AddressSpace *spapr_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn)
782 {
783 sPAPRPHBState *phb = opaque;
784
785 return &phb->iommu_as;
786 }
787
788 static char *spapr_phb_vfio_get_loc_code(sPAPRPHBState *sphb, PCIDevice *pdev)
789 {
790 char *path = NULL, *buf = NULL, *host = NULL;
791
792 /* Get the PCI VFIO host id */
793 host = object_property_get_str(OBJECT(pdev), "host", NULL);
794 if (!host) {
795 goto err_out;
796 }
797
798 /* Construct the path of the file that will give us the DT location */
799 path = g_strdup_printf("/sys/bus/pci/devices/%s/devspec", host);
800 g_free(host);
801 if (!g_file_get_contents(path, &buf, NULL, NULL)) {
802 goto err_out;
803 }
804 g_free(path);
805
806 /* Construct and read from host device tree the loc-code */
807 path = g_strdup_printf("/proc/device-tree%s/ibm,loc-code", buf);
808 g_free(buf);
809 if (!g_file_get_contents(path, &buf, NULL, NULL)) {
810 goto err_out;
811 }
812 return buf;
813
814 err_out:
815 g_free(path);
816 return NULL;
817 }
818
819 static char *spapr_phb_get_loc_code(sPAPRPHBState *sphb, PCIDevice *pdev)
820 {
821 char *buf;
822 const char *devtype = "qemu";
823 uint32_t busnr = pci_bus_num(PCI_BUS(qdev_get_parent_bus(DEVICE(pdev))));
824
825 if (object_dynamic_cast(OBJECT(pdev), "vfio-pci")) {
826 buf = spapr_phb_vfio_get_loc_code(sphb, pdev);
827 if (buf) {
828 return buf;
829 }
830 devtype = "vfio";
831 }
832 /*
833 * For emulated devices and VFIO-failure case, make up
834 * the loc-code.
835 */
836 buf = g_strdup_printf("%s_%s:%04x:%02x:%02x.%x",
837 devtype, pdev->name, sphb->index, busnr,
838 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
839 return buf;
840 }
841
842 /* Macros to operate with address in OF binding to PCI */
843 #define b_x(x, p, l) (((x) & ((1<<(l))-1)) << (p))
844 #define b_n(x) b_x((x), 31, 1) /* 0 if relocatable */
845 #define b_p(x) b_x((x), 30, 1) /* 1 if prefetchable */
846 #define b_t(x) b_x((x), 29, 1) /* 1 if the address is aliased */
847 #define b_ss(x) b_x((x), 24, 2) /* the space code */
848 #define b_bbbbbbbb(x) b_x((x), 16, 8) /* bus number */
849 #define b_ddddd(x) b_x((x), 11, 5) /* device number */
850 #define b_fff(x) b_x((x), 8, 3) /* function number */
851 #define b_rrrrrrrr(x) b_x((x), 0, 8) /* register number */
852
853 /* for 'reg'/'assigned-addresses' OF properties */
854 #define RESOURCE_CELLS_SIZE 2
855 #define RESOURCE_CELLS_ADDRESS 3
856
857 typedef struct ResourceFields {
858 uint32_t phys_hi;
859 uint32_t phys_mid;
860 uint32_t phys_lo;
861 uint32_t size_hi;
862 uint32_t size_lo;
863 } QEMU_PACKED ResourceFields;
864
865 typedef struct ResourceProps {
866 ResourceFields reg[8];
867 ResourceFields assigned[7];
868 uint32_t reg_len;
869 uint32_t assigned_len;
870 } ResourceProps;
871
872 /* fill in the 'reg'/'assigned-resources' OF properties for
873 * a PCI device. 'reg' describes resource requirements for a
874 * device's IO/MEM regions, 'assigned-addresses' describes the
875 * actual resource assignments.
876 *
877 * the properties are arrays of ('phys-addr', 'size') pairs describing
878 * the addressable regions of the PCI device, where 'phys-addr' is a
879 * RESOURCE_CELLS_ADDRESS-tuple of 32-bit integers corresponding to
880 * (phys.hi, phys.mid, phys.lo), and 'size' is a
881 * RESOURCE_CELLS_SIZE-tuple corresponding to (size.hi, size.lo).
882 *
883 * phys.hi = 0xYYXXXXZZ, where:
884 * 0xYY = npt000ss
885 * ||| |
886 * ||| +-- space code
887 * ||| |
888 * ||| + 00 if configuration space
889 * ||| + 01 if IO region,
890 * ||| + 10 if 32-bit MEM region
891 * ||| + 11 if 64-bit MEM region
892 * |||
893 * ||+------ for non-relocatable IO: 1 if aliased
894 * || for relocatable IO: 1 if below 64KB
895 * || for MEM: 1 if below 1MB
896 * |+------- 1 if region is prefetchable
897 * +-------- 1 if region is non-relocatable
898 * 0xXXXX = bbbbbbbb dddddfff, encoding bus, slot, and function
899 * bits respectively
900 * 0xZZ = rrrrrrrr, the register number of the BAR corresponding
901 * to the region
902 *
903 * phys.mid and phys.lo correspond respectively to the hi/lo portions
904 * of the actual address of the region.
905 *
906 * how the phys-addr/size values are used differ slightly between
907 * 'reg' and 'assigned-addresses' properties. namely, 'reg' has
908 * an additional description for the config space region of the
909 * device, and in the case of QEMU has n=0 and phys.mid=phys.lo=0
910 * to describe the region as relocatable, with an address-mapping
911 * that corresponds directly to the PHB's address space for the
912 * resource. 'assigned-addresses' always has n=1 set with an absolute
913 * address assigned for the resource. in general, 'assigned-addresses'
914 * won't be populated, since addresses for PCI devices are generally
915 * unmapped initially and left to the guest to assign.
916 *
917 * note also that addresses defined in these properties are, at least
918 * for PAPR guests, relative to the PHBs IO/MEM windows, and
919 * correspond directly to the addresses in the BARs.
920 *
921 * in accordance with PCI Bus Binding to Open Firmware,
922 * IEEE Std 1275-1994, section 4.1.1, as implemented by PAPR+ v2.7,
923 * Appendix C.
924 */
925 static void populate_resource_props(PCIDevice *d, ResourceProps *rp)
926 {
927 int bus_num = pci_bus_num(PCI_BUS(qdev_get_parent_bus(DEVICE(d))));
928 uint32_t dev_id = (b_bbbbbbbb(bus_num) |
929 b_ddddd(PCI_SLOT(d->devfn)) |
930 b_fff(PCI_FUNC(d->devfn)));
931 ResourceFields *reg, *assigned;
932 int i, reg_idx = 0, assigned_idx = 0;
933
934 /* config space region */
935 reg = &rp->reg[reg_idx++];
936 reg->phys_hi = cpu_to_be32(dev_id);
937 reg->phys_mid = 0;
938 reg->phys_lo = 0;
939 reg->size_hi = 0;
940 reg->size_lo = 0;
941
942 for (i = 0; i < PCI_NUM_REGIONS; i++) {
943 if (!d->io_regions[i].size) {
944 continue;
945 }
946
947 reg = &rp->reg[reg_idx++];
948
949 reg->phys_hi = cpu_to_be32(dev_id | b_rrrrrrrr(pci_bar(d, i)));
950 if (d->io_regions[i].type & PCI_BASE_ADDRESS_SPACE_IO) {
951 reg->phys_hi |= cpu_to_be32(b_ss(1));
952 } else if (d->io_regions[i].type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
953 reg->phys_hi |= cpu_to_be32(b_ss(3));
954 } else {
955 reg->phys_hi |= cpu_to_be32(b_ss(2));
956 }
957 reg->phys_mid = 0;
958 reg->phys_lo = 0;
959 reg->size_hi = cpu_to_be32(d->io_regions[i].size >> 32);
960 reg->size_lo = cpu_to_be32(d->io_regions[i].size);
961
962 if (d->io_regions[i].addr == PCI_BAR_UNMAPPED) {
963 continue;
964 }
965
966 assigned = &rp->assigned[assigned_idx++];
967 assigned->phys_hi = cpu_to_be32(reg->phys_hi | b_n(1));
968 assigned->phys_mid = cpu_to_be32(d->io_regions[i].addr >> 32);
969 assigned->phys_lo = cpu_to_be32(d->io_regions[i].addr);
970 assigned->size_hi = reg->size_hi;
971 assigned->size_lo = reg->size_lo;
972 }
973
974 rp->reg_len = reg_idx * sizeof(ResourceFields);
975 rp->assigned_len = assigned_idx * sizeof(ResourceFields);
976 }
977
978 typedef struct PCIClass PCIClass;
979 typedef struct PCISubClass PCISubClass;
980 typedef struct PCIIFace PCIIFace;
981
982 struct PCIIFace {
983 int iface;
984 const char *name;
985 };
986
987 struct PCISubClass {
988 int subclass;
989 const char *name;
990 const PCIIFace *iface;
991 };
992
993 struct PCIClass {
994 const char *name;
995 const PCISubClass *subc;
996 };
997
998 static const PCISubClass undef_subclass[] = {
999 { PCI_CLASS_NOT_DEFINED_VGA, "display", NULL },
1000 { 0xFF, NULL, NULL },
1001 };
1002
1003 static const PCISubClass mass_subclass[] = {
1004 { PCI_CLASS_STORAGE_SCSI, "scsi", NULL },
1005 { PCI_CLASS_STORAGE_IDE, "ide", NULL },
1006 { PCI_CLASS_STORAGE_FLOPPY, "fdc", NULL },
1007 { PCI_CLASS_STORAGE_IPI, "ipi", NULL },
1008 { PCI_CLASS_STORAGE_RAID, "raid", NULL },
1009 { PCI_CLASS_STORAGE_ATA, "ata", NULL },
1010 { PCI_CLASS_STORAGE_SATA, "sata", NULL },
1011 { PCI_CLASS_STORAGE_SAS, "sas", NULL },
1012 { 0xFF, NULL, NULL },
1013 };
1014
1015 static const PCISubClass net_subclass[] = {
1016 { PCI_CLASS_NETWORK_ETHERNET, "ethernet", NULL },
1017 { PCI_CLASS_NETWORK_TOKEN_RING, "token-ring", NULL },
1018 { PCI_CLASS_NETWORK_FDDI, "fddi", NULL },
1019 { PCI_CLASS_NETWORK_ATM, "atm", NULL },
1020 { PCI_CLASS_NETWORK_ISDN, "isdn", NULL },
1021 { PCI_CLASS_NETWORK_WORLDFIP, "worldfip", NULL },
1022 { PCI_CLASS_NETWORK_PICMG214, "picmg", NULL },
1023 { 0xFF, NULL, NULL },
1024 };
1025
1026 static const PCISubClass displ_subclass[] = {
1027 { PCI_CLASS_DISPLAY_VGA, "vga", NULL },
1028 { PCI_CLASS_DISPLAY_XGA, "xga", NULL },
1029 { PCI_CLASS_DISPLAY_3D, "3d-controller", NULL },
1030 { 0xFF, NULL, NULL },
1031 };
1032
1033 static const PCISubClass media_subclass[] = {
1034 { PCI_CLASS_MULTIMEDIA_VIDEO, "video", NULL },
1035 { PCI_CLASS_MULTIMEDIA_AUDIO, "sound", NULL },
1036 { PCI_CLASS_MULTIMEDIA_PHONE, "telephony", NULL },
1037 { 0xFF, NULL, NULL },
1038 };
1039
1040 static const PCISubClass mem_subclass[] = {
1041 { PCI_CLASS_MEMORY_RAM, "memory", NULL },
1042 { PCI_CLASS_MEMORY_FLASH, "flash", NULL },
1043 { 0xFF, NULL, NULL },
1044 };
1045
1046 static const PCISubClass bridg_subclass[] = {
1047 { PCI_CLASS_BRIDGE_HOST, "host", NULL },
1048 { PCI_CLASS_BRIDGE_ISA, "isa", NULL },
1049 { PCI_CLASS_BRIDGE_EISA, "eisa", NULL },
1050 { PCI_CLASS_BRIDGE_MC, "mca", NULL },
1051 { PCI_CLASS_BRIDGE_PCI, "pci", NULL },
1052 { PCI_CLASS_BRIDGE_PCMCIA, "pcmcia", NULL },
1053 { PCI_CLASS_BRIDGE_NUBUS, "nubus", NULL },
1054 { PCI_CLASS_BRIDGE_CARDBUS, "cardbus", NULL },
1055 { PCI_CLASS_BRIDGE_RACEWAY, "raceway", NULL },
1056 { PCI_CLASS_BRIDGE_PCI_SEMITP, "semi-transparent-pci", NULL },
1057 { PCI_CLASS_BRIDGE_IB_PCI, "infiniband", NULL },
1058 { 0xFF, NULL, NULL },
1059 };
1060
1061 static const PCISubClass comm_subclass[] = {
1062 { PCI_CLASS_COMMUNICATION_SERIAL, "serial", NULL },
1063 { PCI_CLASS_COMMUNICATION_PARALLEL, "parallel", NULL },
1064 { PCI_CLASS_COMMUNICATION_MULTISERIAL, "multiport-serial", NULL },
1065 { PCI_CLASS_COMMUNICATION_MODEM, "modem", NULL },
1066 { PCI_CLASS_COMMUNICATION_GPIB, "gpib", NULL },
1067 { PCI_CLASS_COMMUNICATION_SC, "smart-card", NULL },
1068 { 0xFF, NULL, NULL, },
1069 };
1070
1071 static const PCIIFace pic_iface[] = {
1072 { PCI_CLASS_SYSTEM_PIC_IOAPIC, "io-apic" },
1073 { PCI_CLASS_SYSTEM_PIC_IOXAPIC, "io-xapic" },
1074 { 0xFF, NULL },
1075 };
1076
1077 static const PCISubClass sys_subclass[] = {
1078 { PCI_CLASS_SYSTEM_PIC, "interrupt-controller", pic_iface },
1079 { PCI_CLASS_SYSTEM_DMA, "dma-controller", NULL },
1080 { PCI_CLASS_SYSTEM_TIMER, "timer", NULL },
1081 { PCI_CLASS_SYSTEM_RTC, "rtc", NULL },
1082 { PCI_CLASS_SYSTEM_PCI_HOTPLUG, "hot-plug-controller", NULL },
1083 { PCI_CLASS_SYSTEM_SDHCI, "sd-host-controller", NULL },
1084 { 0xFF, NULL, NULL },
1085 };
1086
1087 static const PCISubClass inp_subclass[] = {
1088 { PCI_CLASS_INPUT_KEYBOARD, "keyboard", NULL },
1089 { PCI_CLASS_INPUT_PEN, "pen", NULL },
1090 { PCI_CLASS_INPUT_MOUSE, "mouse", NULL },
1091 { PCI_CLASS_INPUT_SCANNER, "scanner", NULL },
1092 { PCI_CLASS_INPUT_GAMEPORT, "gameport", NULL },
1093 { 0xFF, NULL, NULL },
1094 };
1095
1096 static const PCISubClass dock_subclass[] = {
1097 { PCI_CLASS_DOCKING_GENERIC, "dock", NULL },
1098 { 0xFF, NULL, NULL },
1099 };
1100
1101 static const PCISubClass cpu_subclass[] = {
1102 { PCI_CLASS_PROCESSOR_PENTIUM, "pentium", NULL },
1103 { PCI_CLASS_PROCESSOR_POWERPC, "powerpc", NULL },
1104 { PCI_CLASS_PROCESSOR_MIPS, "mips", NULL },
1105 { PCI_CLASS_PROCESSOR_CO, "co-processor", NULL },
1106 { 0xFF, NULL, NULL },
1107 };
1108
1109 static const PCIIFace usb_iface[] = {
1110 { PCI_CLASS_SERIAL_USB_UHCI, "usb-uhci" },
1111 { PCI_CLASS_SERIAL_USB_OHCI, "usb-ohci", },
1112 { PCI_CLASS_SERIAL_USB_EHCI, "usb-ehci" },
1113 { PCI_CLASS_SERIAL_USB_XHCI, "usb-xhci" },
1114 { PCI_CLASS_SERIAL_USB_UNKNOWN, "usb-unknown" },
1115 { PCI_CLASS_SERIAL_USB_DEVICE, "usb-device" },
1116 { 0xFF, NULL },
1117 };
1118
1119 static const PCISubClass ser_subclass[] = {
1120 { PCI_CLASS_SERIAL_FIREWIRE, "firewire", NULL },
1121 { PCI_CLASS_SERIAL_ACCESS, "access-bus", NULL },
1122 { PCI_CLASS_SERIAL_SSA, "ssa", NULL },
1123 { PCI_CLASS_SERIAL_USB, "usb", usb_iface },
1124 { PCI_CLASS_SERIAL_FIBER, "fibre-channel", NULL },
1125 { PCI_CLASS_SERIAL_SMBUS, "smb", NULL },
1126 { PCI_CLASS_SERIAL_IB, "infiniband", NULL },
1127 { PCI_CLASS_SERIAL_IPMI, "ipmi", NULL },
1128 { PCI_CLASS_SERIAL_SERCOS, "sercos", NULL },
1129 { PCI_CLASS_SERIAL_CANBUS, "canbus", NULL },
1130 { 0xFF, NULL, NULL },
1131 };
1132
1133 static const PCISubClass wrl_subclass[] = {
1134 { PCI_CLASS_WIRELESS_IRDA, "irda", NULL },
1135 { PCI_CLASS_WIRELESS_CIR, "consumer-ir", NULL },
1136 { PCI_CLASS_WIRELESS_RF_CONTROLLER, "rf-controller", NULL },
1137 { PCI_CLASS_WIRELESS_BLUETOOTH, "bluetooth", NULL },
1138 { PCI_CLASS_WIRELESS_BROADBAND, "broadband", NULL },
1139 { 0xFF, NULL, NULL },
1140 };
1141
1142 static const PCISubClass sat_subclass[] = {
1143 { PCI_CLASS_SATELLITE_TV, "satellite-tv", NULL },
1144 { PCI_CLASS_SATELLITE_AUDIO, "satellite-audio", NULL },
1145 { PCI_CLASS_SATELLITE_VOICE, "satellite-voice", NULL },
1146 { PCI_CLASS_SATELLITE_DATA, "satellite-data", NULL },
1147 { 0xFF, NULL, NULL },
1148 };
1149
1150 static const PCISubClass crypt_subclass[] = {
1151 { PCI_CLASS_CRYPT_NETWORK, "network-encryption", NULL },
1152 { PCI_CLASS_CRYPT_ENTERTAINMENT,
1153 "entertainment-encryption", NULL },
1154 { 0xFF, NULL, NULL },
1155 };
1156
1157 static const PCISubClass spc_subclass[] = {
1158 { PCI_CLASS_SP_DPIO, "dpio", NULL },
1159 { PCI_CLASS_SP_PERF, "counter", NULL },
1160 { PCI_CLASS_SP_SYNCH, "measurement", NULL },
1161 { PCI_CLASS_SP_MANAGEMENT, "management-card", NULL },
1162 { 0xFF, NULL, NULL },
1163 };
1164
1165 static const PCIClass pci_classes[] = {
1166 { "legacy-device", undef_subclass },
1167 { "mass-storage", mass_subclass },
1168 { "network", net_subclass },
1169 { "display", displ_subclass, },
1170 { "multimedia-device", media_subclass },
1171 { "memory-controller", mem_subclass },
1172 { "unknown-bridge", bridg_subclass },
1173 { "communication-controller", comm_subclass},
1174 { "system-peripheral", sys_subclass },
1175 { "input-controller", inp_subclass },
1176 { "docking-station", dock_subclass },
1177 { "cpu", cpu_subclass },
1178 { "serial-bus", ser_subclass },
1179 { "wireless-controller", wrl_subclass },
1180 { "intelligent-io", NULL },
1181 { "satellite-device", sat_subclass },
1182 { "encryption", crypt_subclass },
1183 { "data-processing-controller", spc_subclass },
1184 };
1185
1186 static const char *pci_find_device_name(uint8_t class, uint8_t subclass,
1187 uint8_t iface)
1188 {
1189 const PCIClass *pclass;
1190 const PCISubClass *psubclass;
1191 const PCIIFace *piface;
1192 const char *name;
1193
1194 if (class >= ARRAY_SIZE(pci_classes)) {
1195 return "pci";
1196 }
1197
1198 pclass = pci_classes + class;
1199 name = pclass->name;
1200
1201 if (pclass->subc == NULL) {
1202 return name;
1203 }
1204
1205 psubclass = pclass->subc;
1206 while ((psubclass->subclass & 0xff) != 0xff) {
1207 if ((psubclass->subclass & 0xff) == subclass) {
1208 name = psubclass->name;
1209 break;
1210 }
1211 psubclass++;
1212 }
1213
1214 piface = psubclass->iface;
1215 if (piface == NULL) {
1216 return name;
1217 }
1218 while ((piface->iface & 0xff) != 0xff) {
1219 if ((piface->iface & 0xff) == iface) {
1220 name = piface->name;
1221 break;
1222 }
1223 piface++;
1224 }
1225
1226 return name;
1227 }
1228
1229 static gchar *pci_get_node_name(PCIDevice *dev)
1230 {
1231 int slot = PCI_SLOT(dev->devfn);
1232 int func = PCI_FUNC(dev->devfn);
1233 uint32_t ccode = pci_default_read_config(dev, PCI_CLASS_PROG, 3);
1234 const char *name;
1235
1236 name = pci_find_device_name((ccode >> 16) & 0xff, (ccode >> 8) & 0xff,
1237 ccode & 0xff);
1238
1239 if (func != 0) {
1240 return g_strdup_printf("%s@%x,%x", name, slot, func);
1241 } else {
1242 return g_strdup_printf("%s@%x", name, slot);
1243 }
1244 }
1245
1246 static uint32_t spapr_phb_get_pci_drc_index(sPAPRPHBState *phb,
1247 PCIDevice *pdev);
1248
1249 static void spapr_populate_pci_child_dt(PCIDevice *dev, void *fdt, int offset,
1250 sPAPRPHBState *sphb)
1251 {
1252 ResourceProps rp;
1253 bool is_bridge = false;
1254 int pci_status;
1255 char *buf = NULL;
1256 uint32_t drc_index = spapr_phb_get_pci_drc_index(sphb, dev);
1257 uint32_t ccode = pci_default_read_config(dev, PCI_CLASS_PROG, 3);
1258 uint32_t max_msi, max_msix;
1259
1260 if (pci_default_read_config(dev, PCI_HEADER_TYPE, 1) ==
1261 PCI_HEADER_TYPE_BRIDGE) {
1262 is_bridge = true;
1263 }
1264
1265 /* in accordance with PAPR+ v2.7 13.6.3, Table 181 */
1266 _FDT(fdt_setprop_cell(fdt, offset, "vendor-id",
1267 pci_default_read_config(dev, PCI_VENDOR_ID, 2)));
1268 _FDT(fdt_setprop_cell(fdt, offset, "device-id",
1269 pci_default_read_config(dev, PCI_DEVICE_ID, 2)));
1270 _FDT(fdt_setprop_cell(fdt, offset, "revision-id",
1271 pci_default_read_config(dev, PCI_REVISION_ID, 1)));
1272 _FDT(fdt_setprop_cell(fdt, offset, "class-code", ccode));
1273 if (pci_default_read_config(dev, PCI_INTERRUPT_PIN, 1)) {
1274 _FDT(fdt_setprop_cell(fdt, offset, "interrupts",
1275 pci_default_read_config(dev, PCI_INTERRUPT_PIN, 1)));
1276 }
1277
1278 if (!is_bridge) {
1279 _FDT(fdt_setprop_cell(fdt, offset, "min-grant",
1280 pci_default_read_config(dev, PCI_MIN_GNT, 1)));
1281 _FDT(fdt_setprop_cell(fdt, offset, "max-latency",
1282 pci_default_read_config(dev, PCI_MAX_LAT, 1)));
1283 }
1284
1285 if (pci_default_read_config(dev, PCI_SUBSYSTEM_ID, 2)) {
1286 _FDT(fdt_setprop_cell(fdt, offset, "subsystem-id",
1287 pci_default_read_config(dev, PCI_SUBSYSTEM_ID, 2)));
1288 }
1289
1290 if (pci_default_read_config(dev, PCI_SUBSYSTEM_VENDOR_ID, 2)) {
1291 _FDT(fdt_setprop_cell(fdt, offset, "subsystem-vendor-id",
1292 pci_default_read_config(dev, PCI_SUBSYSTEM_VENDOR_ID, 2)));
1293 }
1294
1295 _FDT(fdt_setprop_cell(fdt, offset, "cache-line-size",
1296 pci_default_read_config(dev, PCI_CACHE_LINE_SIZE, 1)));
1297
1298 /* the following fdt cells are masked off the pci status register */
1299 pci_status = pci_default_read_config(dev, PCI_STATUS, 2);
1300 _FDT(fdt_setprop_cell(fdt, offset, "devsel-speed",
1301 PCI_STATUS_DEVSEL_MASK & pci_status));
1302
1303 if (pci_status & PCI_STATUS_FAST_BACK) {
1304 _FDT(fdt_setprop(fdt, offset, "fast-back-to-back", NULL, 0));
1305 }
1306 if (pci_status & PCI_STATUS_66MHZ) {
1307 _FDT(fdt_setprop(fdt, offset, "66mhz-capable", NULL, 0));
1308 }
1309 if (pci_status & PCI_STATUS_UDF) {
1310 _FDT(fdt_setprop(fdt, offset, "udf-supported", NULL, 0));
1311 }
1312
1313 _FDT(fdt_setprop_string(fdt, offset, "name",
1314 pci_find_device_name((ccode >> 16) & 0xff,
1315 (ccode >> 8) & 0xff,
1316 ccode & 0xff)));
1317
1318 buf = spapr_phb_get_loc_code(sphb, dev);
1319 _FDT(fdt_setprop_string(fdt, offset, "ibm,loc-code", buf));
1320 g_free(buf);
1321
1322 if (drc_index) {
1323 _FDT(fdt_setprop_cell(fdt, offset, "ibm,my-drc-index", drc_index));
1324 }
1325
1326 _FDT(fdt_setprop_cell(fdt, offset, "#address-cells",
1327 RESOURCE_CELLS_ADDRESS));
1328 _FDT(fdt_setprop_cell(fdt, offset, "#size-cells",
1329 RESOURCE_CELLS_SIZE));
1330
1331 if (msi_present(dev)) {
1332 max_msi = msi_nr_vectors_allocated(dev);
1333 if (max_msi) {
1334 _FDT(fdt_setprop_cell(fdt, offset, "ibm,req#msi", max_msi));
1335 }
1336 }
1337 if (msix_present(dev)) {
1338 max_msix = dev->msix_entries_nr;
1339 if (max_msix) {
1340 _FDT(fdt_setprop_cell(fdt, offset, "ibm,req#msi-x", max_msix));
1341 }
1342 }
1343
1344 populate_resource_props(dev, &rp);
1345 _FDT(fdt_setprop(fdt, offset, "reg", (uint8_t *)rp.reg, rp.reg_len));
1346 _FDT(fdt_setprop(fdt, offset, "assigned-addresses",
1347 (uint8_t *)rp.assigned, rp.assigned_len));
1348
1349 if (sphb->pcie_ecs && pci_is_express(dev)) {
1350 _FDT(fdt_setprop_cell(fdt, offset, "ibm,pci-config-space-type", 0x1));
1351 }
1352 }
1353
1354 /* create OF node for pci device and required OF DT properties */
1355 static int spapr_create_pci_child_dt(sPAPRPHBState *phb, PCIDevice *dev,
1356 void *fdt, int node_offset)
1357 {
1358 int offset;
1359 gchar *nodename;
1360
1361 nodename = pci_get_node_name(dev);
1362 _FDT(offset = fdt_add_subnode(fdt, node_offset, nodename));
1363 g_free(nodename);
1364
1365 spapr_populate_pci_child_dt(dev, fdt, offset, phb);
1366
1367 return offset;
1368 }
1369
1370 /* Callback to be called during DRC release. */
1371 void spapr_phb_remove_pci_device_cb(DeviceState *dev)
1372 {
1373 /* some version guests do not wait for completion of a device
1374 * cleanup (generally done asynchronously by the kernel) before
1375 * signaling to QEMU that the device is safe, but instead sleep
1376 * for some 'safe' period of time. unfortunately on a busy host
1377 * this sleep isn't guaranteed to be long enough, resulting in
1378 * bad things like IRQ lines being left asserted during final
1379 * device removal. to deal with this we call reset just prior
1380 * to finalizing the device, which will put the device back into
1381 * an 'idle' state, as the device cleanup code expects.
1382 */
1383 pci_device_reset(PCI_DEVICE(dev));
1384 object_unparent(OBJECT(dev));
1385 }
1386
1387 static sPAPRDRConnector *spapr_phb_get_pci_func_drc(sPAPRPHBState *phb,
1388 uint32_t busnr,
1389 int32_t devfn)
1390 {
1391 return spapr_drc_by_id(TYPE_SPAPR_DRC_PCI,
1392 (phb->index << 16) | (busnr << 8) | devfn);
1393 }
1394
1395 static sPAPRDRConnector *spapr_phb_get_pci_drc(sPAPRPHBState *phb,
1396 PCIDevice *pdev)
1397 {
1398 uint32_t busnr = pci_bus_num(PCI_BUS(qdev_get_parent_bus(DEVICE(pdev))));
1399 return spapr_phb_get_pci_func_drc(phb, busnr, pdev->devfn);
1400 }
1401
1402 static uint32_t spapr_phb_get_pci_drc_index(sPAPRPHBState *phb,
1403 PCIDevice *pdev)
1404 {
1405 sPAPRDRConnector *drc = spapr_phb_get_pci_drc(phb, pdev);
1406
1407 if (!drc) {
1408 return 0;
1409 }
1410
1411 return spapr_drc_index(drc);
1412 }
1413
1414 static void spapr_pci_plug(HotplugHandler *plug_handler,
1415 DeviceState *plugged_dev, Error **errp)
1416 {
1417 sPAPRPHBState *phb = SPAPR_PCI_HOST_BRIDGE(DEVICE(plug_handler));
1418 PCIDevice *pdev = PCI_DEVICE(plugged_dev);
1419 sPAPRDRConnector *drc = spapr_phb_get_pci_drc(phb, pdev);
1420 Error *local_err = NULL;
1421 PCIBus *bus = PCI_BUS(qdev_get_parent_bus(DEVICE(pdev)));
1422 uint32_t slotnr = PCI_SLOT(pdev->devfn);
1423 void *fdt = NULL;
1424 int fdt_start_offset, fdt_size;
1425
1426 /* if DR is disabled we don't need to do anything in the case of
1427 * hotplug or coldplug callbacks
1428 */
1429 if (!phb->dr_enabled) {
1430 /* if this is a hotplug operation initiated by the user
1431 * we need to let them know it's not enabled
1432 */
1433 if (plugged_dev->hotplugged) {
1434 error_setg(&local_err, QERR_BUS_NO_HOTPLUG,
1435 object_get_typename(OBJECT(phb)));
1436 }
1437 goto out;
1438 }
1439
1440 g_assert(drc);
1441
1442 /* Following the QEMU convention used for PCIe multifunction
1443 * hotplug, we do not allow functions to be hotplugged to a
1444 * slot that already has function 0 present
1445 */
1446 if (plugged_dev->hotplugged && bus->devices[PCI_DEVFN(slotnr, 0)] &&
1447 PCI_FUNC(pdev->devfn) != 0) {
1448 error_setg(&local_err, "PCI: slot %d function 0 already ocuppied by %s,"
1449 " additional functions can no longer be exposed to guest.",
1450 slotnr, bus->devices[PCI_DEVFN(slotnr, 0)]->name);
1451 goto out;
1452 }
1453
1454 fdt = create_device_tree(&fdt_size);
1455 fdt_start_offset = spapr_create_pci_child_dt(phb, pdev, fdt, 0);
1456
1457 spapr_drc_attach(drc, DEVICE(pdev), fdt, fdt_start_offset, &local_err);
1458 if (local_err) {
1459 goto out;
1460 }
1461
1462 /* If this is function 0, signal hotplug for all the device functions.
1463 * Otherwise defer sending the hotplug event.
1464 */
1465 if (!spapr_drc_hotplugged(plugged_dev)) {
1466 spapr_drc_reset(drc);
1467 } else if (PCI_FUNC(pdev->devfn) == 0) {
1468 int i;
1469
1470 for (i = 0; i < 8; i++) {
1471 sPAPRDRConnector *func_drc;
1472 sPAPRDRConnectorClass *func_drck;
1473 sPAPRDREntitySense state;
1474
1475 func_drc = spapr_phb_get_pci_func_drc(phb, pci_bus_num(bus),
1476 PCI_DEVFN(slotnr, i));
1477 func_drck = SPAPR_DR_CONNECTOR_GET_CLASS(func_drc);
1478 state = func_drck->dr_entity_sense(func_drc);
1479
1480 if (state == SPAPR_DR_ENTITY_SENSE_PRESENT) {
1481 spapr_hotplug_req_add_by_index(func_drc);
1482 }
1483 }
1484 }
1485
1486 out:
1487 if (local_err) {
1488 error_propagate(errp, local_err);
1489 g_free(fdt);
1490 }
1491 }
1492
1493 static void spapr_pci_unplug_request(HotplugHandler *plug_handler,
1494 DeviceState *plugged_dev, Error **errp)
1495 {
1496 sPAPRPHBState *phb = SPAPR_PCI_HOST_BRIDGE(DEVICE(plug_handler));
1497 PCIDevice *pdev = PCI_DEVICE(plugged_dev);
1498 sPAPRDRConnector *drc = spapr_phb_get_pci_drc(phb, pdev);
1499
1500 if (!phb->dr_enabled) {
1501 error_setg(errp, QERR_BUS_NO_HOTPLUG,
1502 object_get_typename(OBJECT(phb)));
1503 return;
1504 }
1505
1506 g_assert(drc);
1507 g_assert(drc->dev == plugged_dev);
1508
1509 if (!spapr_drc_unplug_requested(drc)) {
1510 PCIBus *bus = PCI_BUS(qdev_get_parent_bus(DEVICE(pdev)));
1511 uint32_t slotnr = PCI_SLOT(pdev->devfn);
1512 sPAPRDRConnector *func_drc;
1513 sPAPRDRConnectorClass *func_drck;
1514 sPAPRDREntitySense state;
1515 int i;
1516
1517 /* ensure any other present functions are pending unplug */
1518 if (PCI_FUNC(pdev->devfn) == 0) {
1519 for (i = 1; i < 8; i++) {
1520 func_drc = spapr_phb_get_pci_func_drc(phb, pci_bus_num(bus),
1521 PCI_DEVFN(slotnr, i));
1522 func_drck = SPAPR_DR_CONNECTOR_GET_CLASS(func_drc);
1523 state = func_drck->dr_entity_sense(func_drc);
1524 if (state == SPAPR_DR_ENTITY_SENSE_PRESENT
1525 && !spapr_drc_unplug_requested(func_drc)) {
1526 error_setg(errp,
1527 "PCI: slot %d, function %d still present. "
1528 "Must unplug all non-0 functions first.",
1529 slotnr, i);
1530 return;
1531 }
1532 }
1533 }
1534
1535 spapr_drc_detach(drc);
1536
1537 /* if this isn't func 0, defer unplug event. otherwise signal removal
1538 * for all present functions
1539 */
1540 if (PCI_FUNC(pdev->devfn) == 0) {
1541 for (i = 7; i >= 0; i--) {
1542 func_drc = spapr_phb_get_pci_func_drc(phb, pci_bus_num(bus),
1543 PCI_DEVFN(slotnr, i));
1544 func_drck = SPAPR_DR_CONNECTOR_GET_CLASS(func_drc);
1545 state = func_drck->dr_entity_sense(func_drc);
1546 if (state == SPAPR_DR_ENTITY_SENSE_PRESENT) {
1547 spapr_hotplug_req_remove_by_index(func_drc);
1548 }
1549 }
1550 }
1551 }
1552 }
1553
1554 static void spapr_phb_realize(DeviceState *dev, Error **errp)
1555 {
1556 /* We don't use SPAPR_MACHINE() in order to exit gracefully if the user
1557 * tries to add a sPAPR PHB to a non-pseries machine.
1558 */
1559 sPAPRMachineState *spapr =
1560 (sPAPRMachineState *) object_dynamic_cast(qdev_get_machine(),
1561 TYPE_SPAPR_MACHINE);
1562 sPAPRMachineClass *smc = spapr ? SPAPR_MACHINE_GET_CLASS(spapr) : NULL;
1563 SysBusDevice *s = SYS_BUS_DEVICE(dev);
1564 sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(s);
1565 PCIHostState *phb = PCI_HOST_BRIDGE(s);
1566 char *namebuf;
1567 int i;
1568 PCIBus *bus;
1569 uint64_t msi_window_size = 4096;
1570 sPAPRTCETable *tcet;
1571 const unsigned windows_supported =
1572 sphb->ddw_enabled ? SPAPR_PCI_DMA_MAX_WINDOWS : 1;
1573
1574 if (!spapr) {
1575 error_setg(errp, TYPE_SPAPR_PCI_HOST_BRIDGE " needs a pseries machine");
1576 return;
1577 }
1578
1579 if (sphb->index != (uint32_t)-1) {
1580 Error *local_err = NULL;
1581
1582 smc->phb_placement(spapr, sphb->index,
1583 &sphb->buid, &sphb->io_win_addr,
1584 &sphb->mem_win_addr, &sphb->mem64_win_addr,
1585 windows_supported, sphb->dma_liobn, &local_err);
1586 if (local_err) {
1587 error_propagate(errp, local_err);
1588 return;
1589 }
1590 } else {
1591 error_setg(errp, "\"index\" for PAPR PHB is mandatory");
1592 return;
1593 }
1594
1595 if (sphb->mem64_win_size != 0) {
1596 if (sphb->mem_win_size > SPAPR_PCI_MEM32_WIN_SIZE) {
1597 error_setg(errp, "32-bit memory window of size 0x%"HWADDR_PRIx
1598 " (max 2 GiB)", sphb->mem_win_size);
1599 return;
1600 }
1601
1602 /* 64-bit window defaults to identity mapping */
1603 sphb->mem64_win_pciaddr = sphb->mem64_win_addr;
1604 } else if (sphb->mem_win_size > SPAPR_PCI_MEM32_WIN_SIZE) {
1605 /*
1606 * For compatibility with old configuration, if no 64-bit MMIO
1607 * window is specified, but the ordinary (32-bit) memory
1608 * window is specified as > 2GiB, we treat it as a 2GiB 32-bit
1609 * window, with a 64-bit MMIO window following on immediately
1610 * afterwards
1611 */
1612 sphb->mem64_win_size = sphb->mem_win_size - SPAPR_PCI_MEM32_WIN_SIZE;
1613 sphb->mem64_win_addr = sphb->mem_win_addr + SPAPR_PCI_MEM32_WIN_SIZE;
1614 sphb->mem64_win_pciaddr =
1615 SPAPR_PCI_MEM_WIN_BUS_OFFSET + SPAPR_PCI_MEM32_WIN_SIZE;
1616 sphb->mem_win_size = SPAPR_PCI_MEM32_WIN_SIZE;
1617 }
1618
1619 if (spapr_pci_find_phb(spapr, sphb->buid)) {
1620 error_setg(errp, "PCI host bridges must have unique BUIDs");
1621 return;
1622 }
1623
1624 if (sphb->numa_node != -1 &&
1625 (sphb->numa_node >= MAX_NODES || !numa_info[sphb->numa_node].present)) {
1626 error_setg(errp, "Invalid NUMA node ID for PCI host bridge");
1627 return;
1628 }
1629
1630 sphb->dtbusname = g_strdup_printf("pci@%" PRIx64, sphb->buid);
1631
1632 /* Initialize memory regions */
1633 namebuf = g_strdup_printf("%s.mmio", sphb->dtbusname);
1634 memory_region_init(&sphb->memspace, OBJECT(sphb), namebuf, UINT64_MAX);
1635 g_free(namebuf);
1636
1637 namebuf = g_strdup_printf("%s.mmio32-alias", sphb->dtbusname);
1638 memory_region_init_alias(&sphb->mem32window, OBJECT(sphb),
1639 namebuf, &sphb->memspace,
1640 SPAPR_PCI_MEM_WIN_BUS_OFFSET, sphb->mem_win_size);
1641 g_free(namebuf);
1642 memory_region_add_subregion(get_system_memory(), sphb->mem_win_addr,
1643 &sphb->mem32window);
1644
1645 if (sphb->mem64_win_size != 0) {
1646 namebuf = g_strdup_printf("%s.mmio64-alias", sphb->dtbusname);
1647 memory_region_init_alias(&sphb->mem64window, OBJECT(sphb),
1648 namebuf, &sphb->memspace,
1649 sphb->mem64_win_pciaddr, sphb->mem64_win_size);
1650 g_free(namebuf);
1651
1652 memory_region_add_subregion(get_system_memory(),
1653 sphb->mem64_win_addr,
1654 &sphb->mem64window);
1655 }
1656
1657 /* Initialize IO regions */
1658 namebuf = g_strdup_printf("%s.io", sphb->dtbusname);
1659 memory_region_init(&sphb->iospace, OBJECT(sphb),
1660 namebuf, SPAPR_PCI_IO_WIN_SIZE);
1661 g_free(namebuf);
1662
1663 namebuf = g_strdup_printf("%s.io-alias", sphb->dtbusname);
1664 memory_region_init_alias(&sphb->iowindow, OBJECT(sphb), namebuf,
1665 &sphb->iospace, 0, SPAPR_PCI_IO_WIN_SIZE);
1666 g_free(namebuf);
1667 memory_region_add_subregion(get_system_memory(), sphb->io_win_addr,
1668 &sphb->iowindow);
1669
1670 bus = pci_register_root_bus(dev, NULL,
1671 pci_spapr_set_irq, pci_spapr_map_irq, sphb,
1672 &sphb->memspace, &sphb->iospace,
1673 PCI_DEVFN(0, 0), PCI_NUM_PINS, TYPE_PCI_BUS);
1674 phb->bus = bus;
1675 qbus_set_hotplug_handler(BUS(phb->bus), DEVICE(sphb), NULL);
1676
1677 /*
1678 * Initialize PHB address space.
1679 * By default there will be at least one subregion for default
1680 * 32bit DMA window.
1681 * Later the guest might want to create another DMA window
1682 * which will become another memory subregion.
1683 */
1684 namebuf = g_strdup_printf("%s.iommu-root", sphb->dtbusname);
1685 memory_region_init(&sphb->iommu_root, OBJECT(sphb),
1686 namebuf, UINT64_MAX);
1687 g_free(namebuf);
1688 address_space_init(&sphb->iommu_as, &sphb->iommu_root,
1689 sphb->dtbusname);
1690
1691 /*
1692 * As MSI/MSIX interrupts trigger by writing at MSI/MSIX vectors,
1693 * we need to allocate some memory to catch those writes coming
1694 * from msi_notify()/msix_notify().
1695 * As MSIMessage:addr is going to be the same and MSIMessage:data
1696 * is going to be a VIRQ number, 4 bytes of the MSI MR will only
1697 * be used.
1698 *
1699 * For KVM we want to ensure that this memory is a full page so that
1700 * our memory slot is of page size granularity.
1701 */
1702 #ifdef CONFIG_KVM
1703 if (kvm_enabled()) {
1704 msi_window_size = getpagesize();
1705 }
1706 #endif
1707
1708 memory_region_init_io(&sphb->msiwindow, OBJECT(sphb), &spapr_msi_ops, spapr,
1709 "msi", msi_window_size);
1710 memory_region_add_subregion(&sphb->iommu_root, SPAPR_PCI_MSI_WINDOW,
1711 &sphb->msiwindow);
1712
1713 pci_setup_iommu(bus, spapr_pci_dma_iommu, sphb);
1714
1715 pci_bus_set_route_irq_fn(bus, spapr_route_intx_pin_to_irq);
1716
1717 QLIST_INSERT_HEAD(&spapr->phbs, sphb, list);
1718
1719 /* Initialize the LSI table */
1720 for (i = 0; i < PCI_NUM_PINS; i++) {
1721 uint32_t irq = SPAPR_IRQ_PCI_LSI + sphb->index * PCI_NUM_PINS + i;
1722 Error *local_err = NULL;
1723
1724 if (smc->legacy_irq_allocation) {
1725 irq = spapr_irq_findone(spapr, &local_err);
1726 if (local_err) {
1727 error_propagate_prepend(errp, local_err,
1728 "can't allocate LSIs: ");
1729 return;
1730 }
1731 }
1732
1733 spapr_irq_claim(spapr, irq, true, &local_err);
1734 if (local_err) {
1735 error_propagate_prepend(errp, local_err, "can't allocate LSIs: ");
1736 return;
1737 }
1738
1739 sphb->lsi_table[i].irq = irq;
1740 }
1741
1742 /* allocate connectors for child PCI devices */
1743 if (sphb->dr_enabled) {
1744 for (i = 0; i < PCI_SLOT_MAX * 8; i++) {
1745 spapr_dr_connector_new(OBJECT(phb), TYPE_SPAPR_DRC_PCI,
1746 (sphb->index << 16) | i);
1747 }
1748 }
1749
1750 /* DMA setup */
1751 for (i = 0; i < windows_supported; ++i) {
1752 tcet = spapr_tce_new_table(DEVICE(sphb), sphb->dma_liobn[i]);
1753 if (!tcet) {
1754 error_setg(errp, "Creating window#%d failed for %s",
1755 i, sphb->dtbusname);
1756 return;
1757 }
1758 memory_region_add_subregion(&sphb->iommu_root, 0,
1759 spapr_tce_get_iommu(tcet));
1760 }
1761
1762 sphb->msi = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
1763 }
1764
1765 static int spapr_phb_children_reset(Object *child, void *opaque)
1766 {
1767 DeviceState *dev = (DeviceState *) object_dynamic_cast(child, TYPE_DEVICE);
1768
1769 if (dev) {
1770 device_reset(dev);
1771 }
1772
1773 return 0;
1774 }
1775
1776 void spapr_phb_dma_reset(sPAPRPHBState *sphb)
1777 {
1778 int i;
1779 sPAPRTCETable *tcet;
1780
1781 for (i = 0; i < SPAPR_PCI_DMA_MAX_WINDOWS; ++i) {
1782 tcet = spapr_tce_find_by_liobn(sphb->dma_liobn[i]);
1783
1784 if (tcet && tcet->nb_table) {
1785 spapr_tce_table_disable(tcet);
1786 }
1787 }
1788
1789 /* Register default 32bit DMA window */
1790 tcet = spapr_tce_find_by_liobn(sphb->dma_liobn[0]);
1791 spapr_tce_table_enable(tcet, SPAPR_TCE_PAGE_SHIFT, sphb->dma_win_addr,
1792 sphb->dma_win_size >> SPAPR_TCE_PAGE_SHIFT);
1793 }
1794
1795 static void spapr_phb_reset(DeviceState *qdev)
1796 {
1797 sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(qdev);
1798
1799 spapr_phb_dma_reset(sphb);
1800
1801 /* Reset the IOMMU state */
1802 object_child_foreach(OBJECT(qdev), spapr_phb_children_reset, NULL);
1803
1804 if (spapr_phb_eeh_available(SPAPR_PCI_HOST_BRIDGE(qdev))) {
1805 spapr_phb_vfio_reset(qdev);
1806 }
1807 }
1808
1809 static Property spapr_phb_properties[] = {
1810 DEFINE_PROP_UINT32("index", sPAPRPHBState, index, -1),
1811 DEFINE_PROP_UINT64("mem_win_size", sPAPRPHBState, mem_win_size,
1812 SPAPR_PCI_MEM32_WIN_SIZE),
1813 DEFINE_PROP_UINT64("mem64_win_size", sPAPRPHBState, mem64_win_size,
1814 SPAPR_PCI_MEM64_WIN_SIZE),
1815 DEFINE_PROP_UINT64("io_win_size", sPAPRPHBState, io_win_size,
1816 SPAPR_PCI_IO_WIN_SIZE),
1817 DEFINE_PROP_BOOL("dynamic-reconfiguration", sPAPRPHBState, dr_enabled,
1818 true),
1819 /* Default DMA window is 0..1GB */
1820 DEFINE_PROP_UINT64("dma_win_addr", sPAPRPHBState, dma_win_addr, 0),
1821 DEFINE_PROP_UINT64("dma_win_size", sPAPRPHBState, dma_win_size, 0x40000000),
1822 DEFINE_PROP_UINT64("dma64_win_addr", sPAPRPHBState, dma64_win_addr,
1823 0x800000000000000ULL),
1824 DEFINE_PROP_BOOL("ddw", sPAPRPHBState, ddw_enabled, true),
1825 DEFINE_PROP_UINT64("pgsz", sPAPRPHBState, page_size_mask,
1826 (1ULL << 12) | (1ULL << 16)),
1827 DEFINE_PROP_UINT32("numa_node", sPAPRPHBState, numa_node, -1),
1828 DEFINE_PROP_BOOL("pre-2.8-migration", sPAPRPHBState,
1829 pre_2_8_migration, false),
1830 DEFINE_PROP_BOOL("pcie-extended-configuration-space", sPAPRPHBState,
1831 pcie_ecs, true),
1832 DEFINE_PROP_END_OF_LIST(),
1833 };
1834
1835 static const VMStateDescription vmstate_spapr_pci_lsi = {
1836 .name = "spapr_pci/lsi",
1837 .version_id = 1,
1838 .minimum_version_id = 1,
1839 .fields = (VMStateField[]) {
1840 VMSTATE_UINT32_EQUAL(irq, struct spapr_pci_lsi, NULL),
1841
1842 VMSTATE_END_OF_LIST()
1843 },
1844 };
1845
1846 static const VMStateDescription vmstate_spapr_pci_msi = {
1847 .name = "spapr_pci/msi",
1848 .version_id = 1,
1849 .minimum_version_id = 1,
1850 .fields = (VMStateField []) {
1851 VMSTATE_UINT32(key, spapr_pci_msi_mig),
1852 VMSTATE_UINT32(value.first_irq, spapr_pci_msi_mig),
1853 VMSTATE_UINT32(value.num, spapr_pci_msi_mig),
1854 VMSTATE_END_OF_LIST()
1855 },
1856 };
1857
1858 static int spapr_pci_pre_save(void *opaque)
1859 {
1860 sPAPRPHBState *sphb = opaque;
1861 GHashTableIter iter;
1862 gpointer key, value;
1863 int i;
1864
1865 if (sphb->pre_2_8_migration) {
1866 sphb->mig_liobn = sphb->dma_liobn[0];
1867 sphb->mig_mem_win_addr = sphb->mem_win_addr;
1868 sphb->mig_mem_win_size = sphb->mem_win_size;
1869 sphb->mig_io_win_addr = sphb->io_win_addr;
1870 sphb->mig_io_win_size = sphb->io_win_size;
1871
1872 if ((sphb->mem64_win_size != 0)
1873 && (sphb->mem64_win_addr
1874 == (sphb->mem_win_addr + sphb->mem_win_size))) {
1875 sphb->mig_mem_win_size += sphb->mem64_win_size;
1876 }
1877 }
1878
1879 g_free(sphb->msi_devs);
1880 sphb->msi_devs = NULL;
1881 sphb->msi_devs_num = g_hash_table_size(sphb->msi);
1882 if (!sphb->msi_devs_num) {
1883 return 0;
1884 }
1885 sphb->msi_devs = g_malloc(sphb->msi_devs_num * sizeof(spapr_pci_msi_mig));
1886
1887 g_hash_table_iter_init(&iter, sphb->msi);
1888 for (i = 0; g_hash_table_iter_next(&iter, &key, &value); ++i) {
1889 sphb->msi_devs[i].key = *(uint32_t *) key;
1890 sphb->msi_devs[i].value = *(spapr_pci_msi *) value;
1891 }
1892
1893 return 0;
1894 }
1895
1896 static int spapr_pci_post_load(void *opaque, int version_id)
1897 {
1898 sPAPRPHBState *sphb = opaque;
1899 gpointer key, value;
1900 int i;
1901
1902 for (i = 0; i < sphb->msi_devs_num; ++i) {
1903 key = g_memdup(&sphb->msi_devs[i].key,
1904 sizeof(sphb->msi_devs[i].key));
1905 value = g_memdup(&sphb->msi_devs[i].value,
1906 sizeof(sphb->msi_devs[i].value));
1907 g_hash_table_insert(sphb->msi, key, value);
1908 }
1909 g_free(sphb->msi_devs);
1910 sphb->msi_devs = NULL;
1911 sphb->msi_devs_num = 0;
1912
1913 return 0;
1914 }
1915
1916 static bool pre_2_8_migration(void *opaque, int version_id)
1917 {
1918 sPAPRPHBState *sphb = opaque;
1919
1920 return sphb->pre_2_8_migration;
1921 }
1922
1923 static const VMStateDescription vmstate_spapr_pci = {
1924 .name = "spapr_pci",
1925 .version_id = 2,
1926 .minimum_version_id = 2,
1927 .pre_save = spapr_pci_pre_save,
1928 .post_load = spapr_pci_post_load,
1929 .fields = (VMStateField[]) {
1930 VMSTATE_UINT64_EQUAL(buid, sPAPRPHBState, NULL),
1931 VMSTATE_UINT32_TEST(mig_liobn, sPAPRPHBState, pre_2_8_migration),
1932 VMSTATE_UINT64_TEST(mig_mem_win_addr, sPAPRPHBState, pre_2_8_migration),
1933 VMSTATE_UINT64_TEST(mig_mem_win_size, sPAPRPHBState, pre_2_8_migration),
1934 VMSTATE_UINT64_TEST(mig_io_win_addr, sPAPRPHBState, pre_2_8_migration),
1935 VMSTATE_UINT64_TEST(mig_io_win_size, sPAPRPHBState, pre_2_8_migration),
1936 VMSTATE_STRUCT_ARRAY(lsi_table, sPAPRPHBState, PCI_NUM_PINS, 0,
1937 vmstate_spapr_pci_lsi, struct spapr_pci_lsi),
1938 VMSTATE_INT32(msi_devs_num, sPAPRPHBState),
1939 VMSTATE_STRUCT_VARRAY_ALLOC(msi_devs, sPAPRPHBState, msi_devs_num, 0,
1940 vmstate_spapr_pci_msi, spapr_pci_msi_mig),
1941 VMSTATE_END_OF_LIST()
1942 },
1943 };
1944
1945 static const char *spapr_phb_root_bus_path(PCIHostState *host_bridge,
1946 PCIBus *rootbus)
1947 {
1948 sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(host_bridge);
1949
1950 return sphb->dtbusname;
1951 }
1952
1953 static void spapr_phb_class_init(ObjectClass *klass, void *data)
1954 {
1955 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
1956 DeviceClass *dc = DEVICE_CLASS(klass);
1957 HotplugHandlerClass *hp = HOTPLUG_HANDLER_CLASS(klass);
1958
1959 hc->root_bus_path = spapr_phb_root_bus_path;
1960 dc->realize = spapr_phb_realize;
1961 dc->props = spapr_phb_properties;
1962 dc->reset = spapr_phb_reset;
1963 dc->vmsd = &vmstate_spapr_pci;
1964 /* Supported by TYPE_SPAPR_MACHINE */
1965 dc->user_creatable = true;
1966 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
1967 hp->plug = spapr_pci_plug;
1968 hp->unplug_request = spapr_pci_unplug_request;
1969 }
1970
1971 static const TypeInfo spapr_phb_info = {
1972 .name = TYPE_SPAPR_PCI_HOST_BRIDGE,
1973 .parent = TYPE_PCI_HOST_BRIDGE,
1974 .instance_size = sizeof(sPAPRPHBState),
1975 .class_init = spapr_phb_class_init,
1976 .interfaces = (InterfaceInfo[]) {
1977 { TYPE_HOTPLUG_HANDLER },
1978 { }
1979 }
1980 };
1981
1982 PCIHostState *spapr_create_phb(sPAPRMachineState *spapr, int index)
1983 {
1984 DeviceState *dev;
1985
1986 dev = qdev_create(NULL, TYPE_SPAPR_PCI_HOST_BRIDGE);
1987 qdev_prop_set_uint32(dev, "index", index);
1988 qdev_init_nofail(dev);
1989
1990 return PCI_HOST_BRIDGE(dev);
1991 }
1992
1993 typedef struct sPAPRFDT {
1994 void *fdt;
1995 int node_off;
1996 sPAPRPHBState *sphb;
1997 } sPAPRFDT;
1998
1999 static void spapr_populate_pci_devices_dt(PCIBus *bus, PCIDevice *pdev,
2000 void *opaque)
2001 {
2002 PCIBus *sec_bus;
2003 sPAPRFDT *p = opaque;
2004 int offset;
2005 sPAPRFDT s_fdt;
2006
2007 offset = spapr_create_pci_child_dt(p->sphb, pdev, p->fdt, p->node_off);
2008 if (!offset) {
2009 error_report("Failed to create pci child device tree node");
2010 return;
2011 }
2012
2013 if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) !=
2014 PCI_HEADER_TYPE_BRIDGE)) {
2015 return;
2016 }
2017
2018 sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
2019 if (!sec_bus) {
2020 return;
2021 }
2022
2023 s_fdt.fdt = p->fdt;
2024 s_fdt.node_off = offset;
2025 s_fdt.sphb = p->sphb;
2026 pci_for_each_device_reverse(sec_bus, pci_bus_num(sec_bus),
2027 spapr_populate_pci_devices_dt,
2028 &s_fdt);
2029 }
2030
2031 static void spapr_phb_pci_enumerate_bridge(PCIBus *bus, PCIDevice *pdev,
2032 void *opaque)
2033 {
2034 unsigned int *bus_no = opaque;
2035 unsigned int primary = *bus_no;
2036 unsigned int subordinate = 0xff;
2037 PCIBus *sec_bus = NULL;
2038
2039 if ((pci_default_read_config(pdev, PCI_HEADER_TYPE, 1) !=
2040 PCI_HEADER_TYPE_BRIDGE)) {
2041 return;
2042 }
2043
2044 (*bus_no)++;
2045 pci_default_write_config(pdev, PCI_PRIMARY_BUS, primary, 1);
2046 pci_default_write_config(pdev, PCI_SECONDARY_BUS, *bus_no, 1);
2047 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, *bus_no, 1);
2048
2049 sec_bus = pci_bridge_get_sec_bus(PCI_BRIDGE(pdev));
2050 if (!sec_bus) {
2051 return;
2052 }
2053
2054 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, subordinate, 1);
2055 pci_for_each_device(sec_bus, pci_bus_num(sec_bus),
2056 spapr_phb_pci_enumerate_bridge, bus_no);
2057 pci_default_write_config(pdev, PCI_SUBORDINATE_BUS, *bus_no, 1);
2058 }
2059
2060 static void spapr_phb_pci_enumerate(sPAPRPHBState *phb)
2061 {
2062 PCIBus *bus = PCI_HOST_BRIDGE(phb)->bus;
2063 unsigned int bus_no = 0;
2064
2065 pci_for_each_device(bus, pci_bus_num(bus),
2066 spapr_phb_pci_enumerate_bridge,
2067 &bus_no);
2068
2069 }
2070
2071 int spapr_populate_pci_dt(sPAPRPHBState *phb, uint32_t xics_phandle, void *fdt,
2072 uint32_t nr_msis)
2073 {
2074 int bus_off, i, j, ret;
2075 gchar *nodename;
2076 uint32_t bus_range[] = { cpu_to_be32(0), cpu_to_be32(0xff) };
2077 struct {
2078 uint32_t hi;
2079 uint64_t child;
2080 uint64_t parent;
2081 uint64_t size;
2082 } QEMU_PACKED ranges[] = {
2083 {
2084 cpu_to_be32(b_ss(1)), cpu_to_be64(0),
2085 cpu_to_be64(phb->io_win_addr),
2086 cpu_to_be64(memory_region_size(&phb->iospace)),
2087 },
2088 {
2089 cpu_to_be32(b_ss(2)), cpu_to_be64(SPAPR_PCI_MEM_WIN_BUS_OFFSET),
2090 cpu_to_be64(phb->mem_win_addr),
2091 cpu_to_be64(phb->mem_win_size),
2092 },
2093 {
2094 cpu_to_be32(b_ss(3)), cpu_to_be64(phb->mem64_win_pciaddr),
2095 cpu_to_be64(phb->mem64_win_addr),
2096 cpu_to_be64(phb->mem64_win_size),
2097 },
2098 };
2099 const unsigned sizeof_ranges =
2100 (phb->mem64_win_size ? 3 : 2) * sizeof(ranges[0]);
2101 uint64_t bus_reg[] = { cpu_to_be64(phb->buid), 0 };
2102 uint32_t interrupt_map_mask[] = {
2103 cpu_to_be32(b_ddddd(-1)|b_fff(0)), 0x0, 0x0, cpu_to_be32(-1)};
2104 uint32_t interrupt_map[PCI_SLOT_MAX * PCI_NUM_PINS][7];
2105 uint32_t ddw_applicable[] = {
2106 cpu_to_be32(RTAS_IBM_QUERY_PE_DMA_WINDOW),
2107 cpu_to_be32(RTAS_IBM_CREATE_PE_DMA_WINDOW),
2108 cpu_to_be32(RTAS_IBM_REMOVE_PE_DMA_WINDOW)
2109 };
2110 uint32_t ddw_extensions[] = {
2111 cpu_to_be32(1),
2112 cpu_to_be32(RTAS_IBM_RESET_PE_DMA_WINDOW)
2113 };
2114 uint32_t associativity[] = {cpu_to_be32(0x4),
2115 cpu_to_be32(0x0),
2116 cpu_to_be32(0x0),
2117 cpu_to_be32(0x0),
2118 cpu_to_be32(phb->numa_node)};
2119 sPAPRTCETable *tcet;
2120 PCIBus *bus = PCI_HOST_BRIDGE(phb)->bus;
2121 sPAPRFDT s_fdt;
2122
2123 /* Start populating the FDT */
2124 nodename = g_strdup_printf("pci@%" PRIx64, phb->buid);
2125 _FDT(bus_off = fdt_add_subnode(fdt, 0, nodename));
2126 g_free(nodename);
2127
2128 /* Write PHB properties */
2129 _FDT(fdt_setprop_string(fdt, bus_off, "device_type", "pci"));
2130 _FDT(fdt_setprop_string(fdt, bus_off, "compatible", "IBM,Logical_PHB"));
2131 _FDT(fdt_setprop_cell(fdt, bus_off, "#address-cells", 0x3));
2132 _FDT(fdt_setprop_cell(fdt, bus_off, "#size-cells", 0x2));
2133 _FDT(fdt_setprop_cell(fdt, bus_off, "#interrupt-cells", 0x1));
2134 _FDT(fdt_setprop(fdt, bus_off, "used-by-rtas", NULL, 0));
2135 _FDT(fdt_setprop(fdt, bus_off, "bus-range", &bus_range, sizeof(bus_range)));
2136 _FDT(fdt_setprop(fdt, bus_off, "ranges", &ranges, sizeof_ranges));
2137 _FDT(fdt_setprop(fdt, bus_off, "reg", &bus_reg, sizeof(bus_reg)));
2138 _FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pci-config-space-type", 0x1));
2139 _FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pe-total-#msi", nr_msis));
2140
2141 /* Dynamic DMA window */
2142 if (phb->ddw_enabled) {
2143 _FDT(fdt_setprop(fdt, bus_off, "ibm,ddw-applicable", &ddw_applicable,
2144 sizeof(ddw_applicable)));
2145 _FDT(fdt_setprop(fdt, bus_off, "ibm,ddw-extensions",
2146 &ddw_extensions, sizeof(ddw_extensions)));
2147 }
2148
2149 /* Advertise NUMA via ibm,associativity */
2150 if (phb->numa_node != -1) {
2151 _FDT(fdt_setprop(fdt, bus_off, "ibm,associativity", associativity,
2152 sizeof(associativity)));
2153 }
2154
2155 /* Build the interrupt-map, this must matches what is done
2156 * in pci_spapr_map_irq
2157 */
2158 _FDT(fdt_setprop(fdt, bus_off, "interrupt-map-mask",
2159 &interrupt_map_mask, sizeof(interrupt_map_mask)));
2160 for (i = 0; i < PCI_SLOT_MAX; i++) {
2161 for (j = 0; j < PCI_NUM_PINS; j++) {
2162 uint32_t *irqmap = interrupt_map[i*PCI_NUM_PINS + j];
2163 int lsi_num = pci_spapr_swizzle(i, j);
2164
2165 irqmap[0] = cpu_to_be32(b_ddddd(i)|b_fff(0));
2166 irqmap[1] = 0;
2167 irqmap[2] = 0;
2168 irqmap[3] = cpu_to_be32(j+1);
2169 irqmap[4] = cpu_to_be32(xics_phandle);
2170 spapr_dt_xics_irq(&irqmap[5], phb->lsi_table[lsi_num].irq, true);
2171 }
2172 }
2173 /* Write interrupt map */
2174 _FDT(fdt_setprop(fdt, bus_off, "interrupt-map", &interrupt_map,
2175 sizeof(interrupt_map)));
2176
2177 tcet = spapr_tce_find_by_liobn(phb->dma_liobn[0]);
2178 if (!tcet) {
2179 return -1;
2180 }
2181 spapr_dma_dt(fdt, bus_off, "ibm,dma-window",
2182 tcet->liobn, tcet->bus_offset,
2183 tcet->nb_table << tcet->page_shift);
2184
2185 /* Walk the bridges and program the bus numbers*/
2186 spapr_phb_pci_enumerate(phb);
2187 _FDT(fdt_setprop_cell(fdt, bus_off, "qemu,phb-enumerated", 0x1));
2188
2189 /* Populate tree nodes with PCI devices attached */
2190 s_fdt.fdt = fdt;
2191 s_fdt.node_off = bus_off;
2192 s_fdt.sphb = phb;
2193 pci_for_each_device_reverse(bus, pci_bus_num(bus),
2194 spapr_populate_pci_devices_dt,
2195 &s_fdt);
2196
2197 ret = spapr_drc_populate_dt(fdt, bus_off, OBJECT(phb),
2198 SPAPR_DR_CONNECTOR_TYPE_PCI);
2199 if (ret) {
2200 return ret;
2201 }
2202
2203 return 0;
2204 }
2205
2206 void spapr_pci_rtas_init(void)
2207 {
2208 spapr_rtas_register(RTAS_READ_PCI_CONFIG, "read-pci-config",
2209 rtas_read_pci_config);
2210 spapr_rtas_register(RTAS_WRITE_PCI_CONFIG, "write-pci-config",
2211 rtas_write_pci_config);
2212 spapr_rtas_register(RTAS_IBM_READ_PCI_CONFIG, "ibm,read-pci-config",
2213 rtas_ibm_read_pci_config);
2214 spapr_rtas_register(RTAS_IBM_WRITE_PCI_CONFIG, "ibm,write-pci-config",
2215 rtas_ibm_write_pci_config);
2216 if (msi_nonbroken) {
2217 spapr_rtas_register(RTAS_IBM_QUERY_INTERRUPT_SOURCE_NUMBER,
2218 "ibm,query-interrupt-source-number",
2219 rtas_ibm_query_interrupt_source_number);
2220 spapr_rtas_register(RTAS_IBM_CHANGE_MSI, "ibm,change-msi",
2221 rtas_ibm_change_msi);
2222 }
2223
2224 spapr_rtas_register(RTAS_IBM_SET_EEH_OPTION,
2225 "ibm,set-eeh-option",
2226 rtas_ibm_set_eeh_option);
2227 spapr_rtas_register(RTAS_IBM_GET_CONFIG_ADDR_INFO2,
2228 "ibm,get-config-addr-info2",
2229 rtas_ibm_get_config_addr_info2);
2230 spapr_rtas_register(RTAS_IBM_READ_SLOT_RESET_STATE2,
2231 "ibm,read-slot-reset-state2",
2232 rtas_ibm_read_slot_reset_state2);
2233 spapr_rtas_register(RTAS_IBM_SET_SLOT_RESET,
2234 "ibm,set-slot-reset",
2235 rtas_ibm_set_slot_reset);
2236 spapr_rtas_register(RTAS_IBM_CONFIGURE_PE,
2237 "ibm,configure-pe",
2238 rtas_ibm_configure_pe);
2239 spapr_rtas_register(RTAS_IBM_SLOT_ERROR_DETAIL,
2240 "ibm,slot-error-detail",
2241 rtas_ibm_slot_error_detail);
2242 }
2243
2244 static void spapr_pci_register_types(void)
2245 {
2246 type_register_static(&spapr_phb_info);
2247 }
2248
2249 type_init(spapr_pci_register_types)
2250
2251 static int spapr_switch_one_vga(DeviceState *dev, void *opaque)
2252 {
2253 bool be = *(bool *)opaque;
2254
2255 if (object_dynamic_cast(OBJECT(dev), "VGA")
2256 || object_dynamic_cast(OBJECT(dev), "secondary-vga")) {
2257 object_property_set_bool(OBJECT(dev), be, "big-endian-framebuffer",
2258 &error_abort);
2259 }
2260 return 0;
2261 }
2262
2263 void spapr_pci_switch_vga(bool big_endian)
2264 {
2265 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
2266 sPAPRPHBState *sphb;
2267
2268 /*
2269 * For backward compatibility with existing guests, we switch
2270 * the endianness of the VGA controller when changing the guest
2271 * interrupt mode
2272 */
2273 QLIST_FOREACH(sphb, &spapr->phbs, list) {
2274 BusState *bus = &PCI_HOST_BRIDGE(sphb)->bus->qbus;
2275 qbus_walk_children(bus, spapr_switch_one_vga, NULL, NULL, NULL,
2276 &big_endian);
2277 }
2278 }
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